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Why don't Java Generics support primitive types?
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Generics in Java are an entirely compile-time construct - the compiler turns all generic uses i...
Cannot import XSSF in Apache POI
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edited Jan 21 '15 at 17:41
Gagravarr
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How to print out more than 20 items (documents) in MongoDB's shell?
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edited Feb 6 at 9:47
Wilfred Knievel
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namedtuple and default values for optional keyword arguments
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>>> Node()
Node(val=None, left=None, right=7)
>>> Node(4)
Node(val=4, left=None, right=7)
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Change type of varchar field to integer: “cannot be cast automatically to type integer”
... TABLE test( x varchar );
CREATE TABLE
=> insert into test(x) values ('14'), (' 42 ');
INSERT 0 2
=> ALTER TABLE test ALTER COLUMN x TYPE integer;
ERROR: column "x" cannot be cast automatically to type integer
HINT: Specify a USING expression to perform the conversion.
=> ALTER TABLE te...
Command to get nth line of STDOUT
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343
Using sed, just for variety:
ls -l | sed -n 2p
Using this alternative, which looks more effi...
How to check if array element exists or not in javascript?
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4
+1, nice. You can also use if(arrayName[index] === 'undefined') as a shortcut
– AnchovyLegend
Oct 8 '...
ASP.NET 4.5 has not been registered on the Web server
... the localDB installed by default. I unchecked "Use IIS Express" in my MVC 4 project properties page (Web tab), then I got the following error:
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Rails Observer Alternatives for 4.0
With Observers officially removed from Rails 4.0 , I'm curious what other developers are using in their place. (Other than using the extracted gem.) While Observers were certainly abused and could easily become unwieldily at times, there were many use-cases outside of just cache-clearing where they...